What does " mentally undressed "mean ?
It's in Friends S01E10
Sandy: Y'know, when I saw you at the store last week, it was probably the first time I ever mentally undressed an elf.

Joey : Wow, that's, uh, dirty.

Question

What does  " mentally undressed "mean ?
It's in Friends S01E10
Sandy: Y'know, when I saw you at the store last week, it was probably the first time I ever mentally undressed an elf.

Joey : Wow, that's, uh, dirty.

Answer

To 'mentally undress' someone is a way of saying that you are imagining what they would look like naked.

Answer

It means that one person is imagining the other person without their clothes on. They're undressing them in their mind.